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			Also in that example file, when i added
 viz.go(viz.FULLSCREEN |viz.QUAD_BUFFER)
 
 only center widow was stereo,  so I had to tell the other windows to be stereo like this:
 
 leftWindow = viz.addWindow(size=WINDOW_SIZE,pos=[0,1])
 leftWindow.stereo(viz.QUAD_BUFFER)
 cave.addWall(LeftWall,window=leftWindow)
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